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Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?

A train starts from A at 6 AM and reaches B at 11 AM on the same day. Another train starts from B at 8 AM and reaches A at 3 PM on the same day. At what time the two trains will have crossed each other? एक ट्रेन सुबह 6 बजे शुरू होती है और उसी दिन सुबह 11 बजे B पर पहुंचती है। एक अन्य ट्रेन B से सुबह 8 बजे शुरू होती है और उसी दिन दोपहर 3 बजे A पहुंचती है। किस समय पर दोनों ट्रेनें एक-दूसरे को पार कर लेगी ?

In a class of 35 students of Geography, following marks were obtained out of 10 marks in unit test -1, 0, 2, 3, 4, 5, 6, 7, 2, 3, 4, 0, 2, 5, 8, 4, 5, 3, 6, 3, 2, 7, 6, 5, 4, 3, 7, 8, 9, 7, 9, 4, 5, 4, 3. Represent the data in the form of a group frequency distribution.

Train X leaves New York at 1 A.M. and travels east at a constant speed of x mph. If train Z leaves New York at 2 AM and travels east, at what constant rate of speed will train Z have to travel in order to catch train X at exactly 5: 30 A.M.? 5/6x b. 9/8x c. 6/5x d. 9/7x e. 3/2x